Infinite Tech-Bits: There are two instances where infinite tech-bits are available, the boss rooms where Lady Deathstrike and Archangel are. Opt to portal out and then come back, all crates and barrels will respawn in either area. If you want to waste enough time, you can get all the bonus skill points that are in the 100K range for every character you desire.

Combos:
This combo works when you have Wolverine and Juggernaut on your team. With Juggernaut, walk over to Wolverine and pick him up, just as you would do to a chair or other item. When you throw Wolverine, he will do a diving attack to
nearby enemies. This also works if you need to send Wolverine over large holes.

Completion bonuses:
Successfully complete the game to unlock the hard difficulty setting enemies at level 50. You can also start a new game with your previous characters at their current experience level.

Play as Deadpool:
Successfully complete the game.

Play as Iron Man:
Find the four homing beacons in Act 1 through 4 and collect the piece of his armor that each set unlocks. Then, save Iron Man after finding the four homing beacons in Act 5.

Play as Professor Xavier:
Successfully complete all Danger Room missions.

Age Of Apocalypse costumes:
Successfully complete Acts 1 and 2 to unlock the Age Of Apocalypse costumes at an X-Traction Point in Act 3. Press L2 at the character change screen to access them.

Easy experience:
For easy leveling up, go to the Holding pen level. There is a location where enemies keep teleporting onto the screen. It is just before the last area entrance. Note: If you stay too long without saving, your game will freeze.

Easy items:
In Act 2 after you rescue Beast on Mikhail's Warship, Blink will open a portal back to Avalon. Go through the portal to Avalon then immediately return to the warship. The scene of rescuing Beast will play again, and the ship will be undamaged. You can go back and get all the items again. Repeat this as many times as desired.

Final area:
First, step into the power chamber in the middle of the vault of ages. Since there is only a limited amount of time you have to use the harmonic powers, choose a faster character to do this. There is a yellow meter that will show you how much harmonic power time you have remaining. Go straight up or straight down to reach the generators. The downward path has a small maze in it. Go right instead of left. At the generator, Apocalypse will be waiting. You must beat him up before you can destroy the generator. Destroy the generator and repeat the same process with the other one. It does not have a maze, and it will be a straight shot directly to it. Just like before, Apocalypse will be waiting for you at the generator. After destroying the power of the harmonic machine, he will bring statues of the horsemen to life. You must focus your attacks on the horsemen and get them out of the way before tackling Apocalypse. When you kill the horsemen, they will return to statue form. Then, kill Apocalypse twice to complete the game. Note: Make sure you have a full load of health and energy packs before attempting this.

Team bonuses:
Use a team with the indicated characters to get the indicated bonus.